Математика...............

Question

Математика...............

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Answer 1

Ответ &/$##@@#$//$##@@@#$9

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Answer 2

(3a-4b)(3a+4b)[2(2,25a²+6ab+4b²)]=(3a-4b)(3a+4b)/[2(1,5a+2b)²]=
=3(1,5a+2b)(3a-4b)/[2(1,5a+2b)²]=3(3a-4b)/[2(1,5a+2b)=(9a-12b)/(3a+4b)